Spreader for road material



June 5, 1923.

J. A. JOHNSON SPREADER FOR ROAD MATERIAL Filed March 1921 m g% if: .H. 2

v Even r a citiaen of the United by which a Patented Jame 5, W23.

UNHTEID srares raraar err ager/ere roe.

JOHN A. JOHNSTON, OF SPRINGFIELD, SAGHU'SE'JHILQ. fiPREADER FOR MATEJL.

Application filed March 1, 1921.

To all whom it may concern:

Be it known that, 1, JOHN A. JOHNSTON, States, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented a new and useful Spreader for Road Material, of which the following is a specification.

This invention relates to a device particularly designed for spreading stone or other similar material over a prepared surface. In road construction it is customary to prepare a foundation and place thereon an upper layer of crushed stone gravel, or other suitable material which should pre sent a smooth and uniform surface.

It is the general object of my invention to improve the construction of spreaders for such pur oses and to provide a spreader ayer of road material of an desired thickness may be deposited at a minimum expense of time and labor.

With this general object in view, an important feature of my invention relates to the provision of novel supporting devices for a spreader, capable of adjustment to adapt the machine to different working conditions.

Another feature of my invention relates to improved devices for attaching and partial y supporting my improved spreader on a truck or wa on.

y invention urther relates to arrangements and combinations of parts which will be hereinafter described and more articu larly pointed out in the appended c aims.

A. preferred form of my invention is shown in the drawings in which Fig. 1 is an end view of my improved spreader;

Fig. 2 is a Fig. 3 is a Fig. 4 is a rear cation; and

Fig. 5 is partial plan view thereof; partial rear elevation;

elevation of a modifia detail section on the line 5'5 runners 14 disposed on each'side thereof.

Each runner 14 is preferably pivoted at 15 to the rear end of a forked arm 16 which in turn is pivoted to the. body at 17. An ad- 30 secured by bolts 31 to the The.

justing screw 18 for each runner is threaded in a bracket 19 secured to the body of the spreader, and engages a U-shaped upward projection 20 of the arm 16.

By adjusting the screws 18 the runners may be held at any desired distance below the bottom of the spreader body, thus regulating the thickness of the layer of material to be deposited.

The front ends of the runners 14 may be connected by a tie-rod 21 pivotally secured to each runner to permit changes in (the relative elevation thereof.

A pair of bars 22 extend forward from the body of the spreader and are rigidly secured to the, front side 10, as clearly shown in Fig. 1., a brace 23 being rovided for the upper portion of the body. e bars 22 are adapted to rest upon'the rear axle or other part or attachment of the truck or wagon by and thus support-a material part of the weight of the spreader andits load.

' I also provide a chain 24 for each bar 22 said chaln having a book 25 at one end adapted to engage the axle or other supporting part of the truck, and having its 0- posite end secured to acrank shaft 26. means of this crank shaft, the spreader may be drawn forward to the desired operative relation with the truck body, where it is held in position by a pawl 27 en ratchet wheel 28 on the crank s aft'26;

Folding braces 29 support the body when detached from the truck.

I find it frequently desirable to provide an adjustable outlet plate at the rear of the spreader, asshown in Figs. 4 and 5. This plate may consist of an angle iron rear side 11 of the spreader and is engaged at each endby an adjusting screw 32 threaded in a bracket 33 on the side 11. By suitabl ad justing the plate 30 the contour o the finished surface may be made straight or it may be crowned to meet the actual con-- ditions of use.

From the foregoing description it will be seen that my improved spreader is of simple and durable construction, and that it is adapted to deposit a uniform layer of road material of any desired thickness, which thickness may be changed at any time of the screws 18.

Separate adjustment of each runner perby adjusting the runners 14% by means which the spreader is drawn,

aging a 

